This document discusses integrating the informal waste sector into solid waste management systems. It notes that the informal sector currently recovers more resources from waste than the formal sector in many low and middle-income countries. Integrating the informal sector can help improve recycling rates, reduce environmental harm, boost resource recovery, and create employment opportunities. The document outlines approaches some organizations have taken to facilitate integration, including involving the informal sector in policymaking and planning, strengthening their organizational capacities, and fostering partnerships between informal and formal private sectors.